Chevy transmission question

Discussion in 'Class A / Diesel Pushers' started by ram1z, Sep 28, 2009.

  1. ram1z

    ram1z New Member

    I have a '96 Rexhall with the 454 eng. The transmission went to 350 degrees on flat highway towing nothing in cruise control. This happened on 1 short trip and then the next trip I'll describe- I shifted down to D not OD, and it stayed there. Then when I hit the mountains, I pushed it hard and the temp went down to 160 degrees and stayed there until I parked. On the trip home, It never went over 160 degrees. Downhill, uphil, onthe freeway in D and OD - it never changed.

    Do you suppose that a filter was plugged in the transmission and the hill torture test cleared it out?
  2. C Nash

    C Nash Senior Member

    Re: Chevy transmission question

    If the filter was plugged it would stay plugged. Hard to understand this one . Maybe a faulty guage? The trans may have been slipping but don't think it would have cured itself after running 350 degrees. Maybe a valve was sticking and it broke loose. If the guage is right the temp will probably raise its ugly head again and that will be bad. JMO
  3. hamdave

    hamdave New Member

    RE: Chevy transmission question

    If it is a 4L80/4L60 I think they have an internal modulator of some kind. I always take mine to an expert

    on the chevy trannys and am not an expert on it. I would have it looked at though, If it doesn't happen again it

    could have just been a faulty reading on the sensor.

  4. Allison Expert

    Allison Expert New Member

    Re: Chevy transmission question

    First off, I would get some kind of inferred thermometer so you can check the transmission temp to the gauge in the vehicle. If they are the same I would be inclined to say it could be a restricted cooler line or you may need to install a bigger or seperate trans cooler.

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